51000065656015 has 64 divisors (see below), whose sum is σ = 71277152034816. Its totient is φ = 34310930798592.

The previous prime is 51000065655947. The next prime is 51000065656019. The reversal of 51000065656015 is 51065656000015.

It is not a de Polignac number, because 51000065656015 - 2¹⁹ = 51000065131727 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51000065656019) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1009017834 + ... + 1009068376.

It is an arithmetic number, because the mean of its divisors is an integer number (1113705500544).

Almost surely, 2^{51000065656015} is an apocalyptic number.

51000065656015 is a deficient number, since it is larger than the sum of its proper divisors (20277086378801).

51000065656015 is a wasteful number, since it uses less digits than its factorization.

51000065656015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53248.

The product of its (nonzero) digits is 135000, while the sum is 40.

The spelling of 51000065656015 in words is "fifty-one trillion, sixty-five million, six hundred fifty-six thousand, fifteen".